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SC2602STRT Datasheet

  • SC2602STRT

  • Synchronous Voltage Mode Controller for Distributed Power Su...

  • 16頁(yè)

  • SEMTECH   SEMTECH

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Synchronous Voltage Mode Controller
for Distributed Power Supply Applications
POWER MANAGEMENT
Description
The SC2602 and SC2602A are low-cost, full featured,
synchronous voltage-mode controllers designed for use
in single ended power supply applications where efficiency
is of primary concern. Synchronous operation allows for
the elimination of heat sinks in many applications. The
SC2602s are ideal for implementing DC/DC converters
needed to power advanced microprocessors in low cost
systems, or in distributed power applications where effi-
ciency is important. Internal level-shift, high-side drive
circuitry, and preset shoot-thru control, allows the use of
inexpensive N-channel power switches.
SC2602s features include temperature compensated
voltage reference, triangle wave oscillator and current
sense comparator circuitry. Power good signaling, shut-
down, and over voltage protection are also provided.
The SC2602 operates at a fixed 200kHz and the
SC2602A at 500kHz, providing a choice for optimum
compromise between efficiency, external component size,
and cost.
Two SC2602s can be used together to sequence power up
of telecom systems. The power good of the first SC2602
connected to the enable of the second SC2602 makes
this possible.
SC2602/SC2602A
Features
Synchronous operation for high efficiency (95%)
R
DS(ON)
current sensing
On-chip power good and OVP functions
Small size with minimum external components
Soft Start
Enable function
Applications
Microprocessor core supply
Low cost synchronous applications
Voltage Regulator Modules (VRM)
DDR termination supplies
Networking power supplies
Sequenced power supplies
Typical Application Circuit
Typical Distributed Power Supply
+5V
+
R1
1k
R2
C1
0.1
R4
10
C2
0.1
1
U1
SC2602
VCC
GND
14
C3
0.1
4.99K
820pF
C5
10.0
C6
680/6.3V
C7
680/6.3V
C8
680/6.3V
Vin
_
5V
PWRGD
2
0.1
OVP
R3
1k
PWRGD
SS/SHDN
13
SHDN
3
OVP
COMP
12
R8
124*
R7
127
4
OCSET
SENSE
11
5
D1
MBR0520
PHASE
BSTH
10
C4
1.0
+12V
Q1
STP40NE
R5
3.9
R6
2.2
Q2
STP40NE
L1
2uH
6
DRVH
BSTL
9
+
C9
180/4V
C10
180/4V
C11
180/4V
C12
180/4V
C13
180/4V
7
PGND
DRVL
8
Vout=2.5V
*
_
Figure 1.
NOTE:
*) Vout = 1.265 x (1+R8/R7)
Revision: October 13, 2004
1
www.semtech.com

SC2602STRT 產(chǎn)品屬性

  • 0現(xiàn)貨

  • 停產(chǎn)

  • -

  • 卷帶（TR）

  • 停產(chǎn)

  • 晶體管驅(qū)動(dòng)器

  • 降壓

  • 正

  • 1

  • 1

  • 4.2V ~ 12.6V

  • 200kHz

  • 95%

  • 是

  • 無(wú)

  • -

  • 使能，相位控制，電源良好，軟啟動(dòng)，

  • -40°C ~ 85°C（TA）

  • 表面貼裝型

  • 14-SOIC（0.154"，3.90mm 寬）

  • 14-SOIC

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